Cee Lo Green took advantage of Muhammad Ali's 70th birthday party at the MGM Hotel & Casino in Las Vegas to prove he's got The Voice!

The singer performed at the star-studded Power of Love Gala this past weekend, which was hosted by Keep Memory Alive founder Larry Ruvo (pictured above).

The organization not only honored the boxer at the celebration, but raised $250,000 for the Cleveland Clinic Lou Ruvo Center for Brain Health and the Muhammad Ali Center!

TY KU was the drink of the evening and Cee Lo even created his own original low calorie cocktail he named, "The Ladykiller."

Guests sipping on the signature drink including Sean “Diddy” Combs, Kelly Rowland, Lenny Kravitz, Cindy Crawford, John Legend, Snoop Dogg, Anthony Hopkins, and many more. Sports greats who attended to celebrate with one of the greatest athletes of all time included Sugar Ray Leonard, Evander Holyfeild, Andre Agassi, Steffie Graf and Randy Couture.